package com.xbts.web.controller.common;

import com.xbts.common.config.PartyIntegralConfig;
import com.xbts.common.constant.Constants;
import com.xbts.common.core.domain.AjaxResult;
import com.xbts.common.utils.DateUtils;
import com.xbts.common.utils.StringUtils;
import com.xbts.common.utils.aspose.FileConvertConstant;
import com.xbts.common.utils.file.FileUploadUtils;
import com.xbts.common.utils.file.FileUtils;
import com.xbts.framework.config.ServerConfig;
import com.xbts.system.service.ISysUserService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

/**
 * 通用请求处理
 *
 * @author xbts
 */
@RestController
@RequestMapping("/common")
@Api(tags = "通用请求处理")
public class CommonController {
    private static final Logger log = LoggerFactory.getLogger(CommonController.class);

    @Autowired
    private ServerConfig serverConfig;
    @Autowired
    private ISysUserService userService;

    private static final String FILE_DELIMETER = ",";

    /**
     * 通用下载请求
     *
     * @param fileName 文件名称
     * @param delete   是否删除
     */
    @GetMapping("/download")
    public void fileDownload(String fileName, Boolean delete, HttpServletResponse response, HttpServletRequest request) {
        try {
            if (!FileUtils.checkAllowDownload(fileName)) {
                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", fileName));
            }
            String realFileName = System.currentTimeMillis() + fileName.substring(fileName.indexOf("_") + 1);
            String filePath = PartyIntegralConfig.getDownloadPath() + fileName;

            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, realFileName);
            FileUtils.writeBytes(filePath, response.getOutputStream());
            if (delete) {
                FileUtils.deleteFile(filePath);
            }
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }

    /**
     * 通用上传请求（单个）
     */
    @PostMapping("/upload")
    public AjaxResult uploadFile(MultipartFile file) throws Exception {
        try {
            // 上传文件路径
            String filePath = PartyIntegralConfig.getUploadPath();
            // 上传并返回新文件名称
            String fileName = FileUploadUtils.upload(filePath, file);
            String url = serverConfig.getUrl() + fileName;
            AjaxResult ajax = AjaxResult.success();
            ajax.put("url", url);
            ajax.put("fileName", fileName);
            ajax.put("newFileName", FileUtils.getName(fileName));
            ajax.put("originalFilename", file.getOriginalFilename());
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 通用上传请求（多个）
     */
    @PostMapping("/uploads")
    public AjaxResult uploadFiles(List<MultipartFile> files) throws Exception {
        try {
            // 上传文件路径
            String filePath = PartyIntegralConfig.getUploadPath();
            List<String> urls = new ArrayList<String>();
            List<String> fileNames = new ArrayList<String>();
            List<String> newFileNames = new ArrayList<String>();
            List<String> originalFilenames = new ArrayList<String>();
            for (MultipartFile file : files) {
                // 上传并返回新文件名称
                String fileName = FileUploadUtils.upload(filePath, file);
                String url = serverConfig.getUrl() + fileName;
                urls.add(url);
                fileNames.add(fileName);
                newFileNames.add(FileUtils.getName(fileName));
                originalFilenames.add(file.getOriginalFilename());
            }
            AjaxResult ajax = AjaxResult.success();
            ajax.put("urls", StringUtils.join(urls, FILE_DELIMETER));
            ajax.put("fileNames", StringUtils.join(fileNames, FILE_DELIMETER));
            ajax.put("newFileNames", StringUtils.join(newFileNames, FILE_DELIMETER));
            ajax.put("originalFilenames", StringUtils.join(originalFilenames, FILE_DELIMETER));
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 本地资源通用下载
     */
    @GetMapping("/download/resource")
    public void resourceDownload(@RequestParam String resource, HttpServletRequest request, HttpServletResponse response) {
        try {
            if (!FileUtils.checkAllowDownload(resource)) {
                throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));
            }
            // 本地资源路径
            String localPath = PartyIntegralConfig.getProfile();
            // 数据库资源地址
            String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);
            // 下载名称
            String downloadName = StringUtils.substringAfterLast(downloadPath, "/");
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, downloadName);
            FileUtils.writeBytes(downloadPath, response.getOutputStream());
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }

    //获取管理员信息
    @GetMapping("/getAdminInfo")
    public AjaxResult getAdminInfo() {
        return AjaxResult.success((Object) userService.selectAdminUserPhone());
    }

    /**
     * 预览文件
     * @param response 响应
     * @param url   文件路径
     */
    @PostMapping("/preview")
    @ApiOperation("预览文件")
    public void preview(HttpServletResponse response, @RequestParam String url) {
        if (StringUtils.isBlank(url)) {
            response.setStatus(404);
            return;
        }
        // 获取文件真实路径
        url = StringUtils.substringAfter(url, Constants.RESOURCE_PREFIX);

        //截取后缀
        String fileType = url.substring(url.lastIndexOf("."));
        ServletOutputStream out = null;
        InputStream in = null;
        try {
            // txt文件预览
            if (FileConvertConstant.TXT.equals(fileType)) {
                FileUtils.previewTxt(response, url);
            } else {
                // doc、docx、ppt、pptx、xls、xlsx文件预览
                in = FileUploadUtils.download(url, fileType);
                if (null != in) {
                    if (FileConvertConstant.SUPPORT_TYPE_TO_PDF.contains(fileType)) {
                        response.setContentType("application/pdf");
                        response.setHeader("Content-Disposition", "attachment;filename=" + DateUtils.getNowDate().getTime() + ".pdf");
                    } else {
                        response.setContentType(fileType);
                        response.setHeader("Content-Disposition", "attachment;filename=" + DateUtils.getNowDate().getTime() + fileType);
                    }
                    response.setHeader("no-log", "1");
                    out = response.getOutputStream();
                    // 读取文件流
                    int len = 0;
                    byte[] buffer = new byte[1024 * 10];
                    while ((len = in.read(buffer)) != -1) {
                        out.write(buffer, 0, len);
                    }
                    out.flush();
                } else {
                    response.setStatus(404);
                }
            }
        } catch (IOException e) {
            log.error("responseFileStream stream error:" + e);
            response.setStatus(500);
        } finally {
            try {
                assert out != null;
                out.close();
                assert in != null;
                in.close();
            } catch (NullPointerException e) {
                log.error("responseFileStream stream close() error:NullPointerException" + e.toString());
            } catch (Exception e) {
                log.error("responseFileStream stream close() error:" + e.toString());
            }
        }

    }
}
